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Subject[PATCH v10 15/16] v4l: Add V4L2_CAP_FENCES to drivers
Date
From: Gustavo Padovan <gustavo.padovan@collabora.com>

Drivers that use videobuf2 are capable of using fences and
should report that to userspace.

v10: - Add CAPS_FENCES to drivers that don't use fh->m2m_ctx.
- Keep the ifdef V4L2_MEM2MEM_DEV.
- Set CAPS_FENCES after vidioc_querycap.
v9: Add in the core.

Signed-off-by: Gustavo Padovan <gustavo.padovan@collabora.com>
Signed-off-by: Ezequiel Garcia <ezequiel@collabora.com>
---
drivers/media/platform/exynos-gsc/gsc-m2m.c | 3 ++-
drivers/media/platform/m2m-deinterlace.c | 3 ++-
drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c | 3 ++-
.../media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c | 2 +-
.../media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c | 3 ++-
drivers/media/platform/mx2_emmaprp.c | 3 ++-
drivers/media/platform/qcom/venus/vdec.c | 3 ++-
drivers/media/platform/qcom/venus/venc.c | 3 ++-
drivers/media/platform/sh_veu.c | 3 ++-
drivers/media/v4l2-core/v4l2-ioctl.c | 24 +++++++++++++++++++++-
10 files changed, 40 insertions(+), 10 deletions(-)

diff --git a/drivers/media/platform/exynos-gsc/gsc-m2m.c b/drivers/media/platform/exynos-gsc/gsc-m2m.c
index e9ff27949a91..fbf072c8aedd 100644
--- a/drivers/media/platform/exynos-gsc/gsc-m2m.c
+++ b/drivers/media/platform/exynos-gsc/gsc-m2m.c
@@ -298,7 +298,8 @@ static int gsc_m2m_querycap(struct file *file, void *fh,
strlcpy(cap->card, GSC_MODULE_NAME " gscaler", sizeof(cap->card));
snprintf(cap->bus_info, sizeof(cap->bus_info), "platform:%s",
dev_name(&gsc->pdev->dev));
- cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE;
+ cap->device_caps = V4L2_CAP_STREAMING | V4L2_CAP_VIDEO_M2M_MPLANE |
+ V4L2_CAP_FENCES;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
diff --git a/drivers/media/platform/m2m-deinterlace.c b/drivers/media/platform/m2m-deinterlace.c
index 1e4195144f39..b7421de1268f 100644
--- a/drivers/media/platform/m2m-deinterlace.c
+++ b/drivers/media/platform/m2m-deinterlace.c
@@ -461,7 +461,8 @@ static int vidioc_querycap(struct file *file, void *priv,
* and are scheduled for removal.
*/
cap->device_caps = V4L2_CAP_VIDEO_CAPTURE | V4L2_CAP_VIDEO_OUTPUT |
- V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
+ V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;

return 0;
diff --git a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
index 583d47724ee8..7aba2ba128ba 100644
--- a/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
+++ b/drivers/media/platform/mtk-mdp/mtk_mdp_m2m.c
@@ -1242,7 +1242,8 @@ int mtk_mdp_register_m2m_device(struct mtk_mdp_dev *mdp)
ret = -ENOMEM;
goto err_video_alloc;
}
- mdp->vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+ mdp->vdev->device_caps = V4L2_CAP_FENCES | V4L2_CAP_VIDEO_M2M_MPLANE |
+ V4L2_CAP_STREAMING;
mdp->vdev->fops = &mtk_mdp_m2m_fops;
mdp->vdev->ioctl_ops = &mtk_mdp_m2m_ioctl_ops;
mdp->vdev->release = video_device_release;
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
index 4334b7394861..75318a4129ea 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_dec_drv.c
@@ -321,7 +321,7 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
vfd_dec->v4l2_dev = &dev->v4l2_dev;
vfd_dec->vfl_dir = VFL_DIR_M2M;
vfd_dec->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
- V4L2_CAP_STREAMING;
+ V4L2_CAP_STREAMING | V4L2_CAP_FENCES;

snprintf(vfd_dec->name, sizeof(vfd_dec->name), "%s",
MTK_VCODEC_DEC_NAME);
diff --git a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
index 83f859e8509c..1c9d4e7262bb 100644
--- a/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
+++ b/drivers/media/platform/mtk-vcodec/mtk_vcodec_enc_drv.c
@@ -339,7 +339,8 @@ static int mtk_vcodec_probe(struct platform_device *pdev)
vfd_enc->v4l2_dev = &dev->v4l2_dev;
vfd_enc->vfl_dir = VFL_DIR_M2M;
vfd_enc->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE |
- V4L2_CAP_STREAMING;
+ V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;

snprintf(vfd_enc->name, sizeof(vfd_enc->name), "%s",
MTK_VCODEC_ENC_NAME);
diff --git a/drivers/media/platform/mx2_emmaprp.c b/drivers/media/platform/mx2_emmaprp.c
index 5a8eff60e95f..230ad00fc62d 100644
--- a/drivers/media/platform/mx2_emmaprp.c
+++ b/drivers/media/platform/mx2_emmaprp.c
@@ -401,7 +401,8 @@ static int vidioc_querycap(struct file *file, void *priv,
{
strncpy(cap->driver, MEM2MEM_NAME, sizeof(cap->driver) - 1);
strncpy(cap->card, MEM2MEM_NAME, sizeof(cap->card) - 1);
- cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
+ cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;
return 0;
}
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index 8d7b4fc95880..9da748d05bd9 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -1099,7 +1099,8 @@ static int vdec_probe(struct platform_device *pdev)
vdev->ioctl_ops = &vdec_ioctl_ops;
vdev->vfl_dir = VFL_DIR_M2M;
vdev->v4l2_dev = &core->v4l2_dev;
- vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+ vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;

ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret)
diff --git a/drivers/media/platform/qcom/venus/venc.c b/drivers/media/platform/qcom/venus/venc.c
index 713c79ba9639..41b25ef2d4dc 100644
--- a/drivers/media/platform/qcom/venus/venc.c
+++ b/drivers/media/platform/qcom/venus/venc.c
@@ -1243,7 +1243,8 @@ static int venc_probe(struct platform_device *pdev)
vdev->ioctl_ops = &venc_ioctl_ops;
vdev->vfl_dir = VFL_DIR_M2M;
vdev->v4l2_dev = &core->v4l2_dev;
- vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING;
+ vdev->device_caps = V4L2_CAP_VIDEO_M2M_MPLANE | V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;

ret = video_register_device(vdev, VFL_TYPE_GRABBER, -1);
if (ret)
diff --git a/drivers/media/platform/sh_veu.c b/drivers/media/platform/sh_veu.c
index 1a0cde017fdf..4ad7ec5a197a 100644
--- a/drivers/media/platform/sh_veu.c
+++ b/drivers/media/platform/sh_veu.c
@@ -351,7 +351,8 @@ static int sh_veu_querycap(struct file *file, void *priv,
strlcpy(cap->driver, "sh-veu", sizeof(cap->driver));
strlcpy(cap->card, "sh-mobile VEU", sizeof(cap->card));
strlcpy(cap->bus_info, "platform:sh-veu", sizeof(cap->bus_info));
- cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING;
+ cap->device_caps = V4L2_CAP_VIDEO_M2M | V4L2_CAP_STREAMING |
+ V4L2_CAP_FENCES;
cap->capabilities = cap->device_caps | V4L2_CAP_DEVICE_CAPS;

return 0;
diff --git a/drivers/media/v4l2-core/v4l2-ioctl.c b/drivers/media/v4l2-core/v4l2-ioctl.c
index 2135ac235a96..4c5e95a0fe6f 100644
--- a/drivers/media/v4l2-core/v4l2-ioctl.c
+++ b/drivers/media/v4l2-core/v4l2-ioctl.c
@@ -29,6 +29,7 @@
#include <media/v4l2-device.h>
#include <media/videobuf2-v4l2.h>
#include <media/v4l2-mc.h>
+#include <media/v4l2-mem2mem.h>

#include <trace/events/v4l2.h>

@@ -1002,6 +1003,8 @@ static int v4l_querycap(const struct v4l2_ioctl_ops *ops,
{
struct v4l2_capability *cap = (struct v4l2_capability *)arg;
struct video_device *vfd = video_devdata(file);
+ struct v4l2_fh *vfh =
+ test_bit(V4L2_FL_USES_V4L2_FH, &vfd->flags) ? fh : NULL;
int ret;

cap->version = LINUX_VERSION_CODE;
@@ -1010,7 +1013,26 @@ static int v4l_querycap(const struct v4l2_ioctl_ops *ops,

ret = ops->vidioc_querycap(file, fh, cap);

- cap->capabilities |= V4L2_CAP_EXT_PIX_FORMAT;
+ /* If a streaming device has a queue or a m2m context,
+ * then the device supports explicit sync.
+ */
+ if (cap->device_caps & V4L2_CAP_STREAMING) {
+ /*
+ * TODO: Drop these additional queue lock
+ * checks once we make vb2_queue lock
+ * mandatory.
+ */
+ if (vfd->queue && vfd->queue->lock)
+ cap->device_caps |= V4L2_CAP_FENCES;
+#if IS_ENABLED(CONFIG_V4L2_MEM2MEM_DEV)
+ if (vfh && vfh->m2m_ctx &&
+ vfh->m2m_ctx->cap_q_ctx.q.lock &&
+ vfh->m2m_ctx->out_q_ctx.q.lock)
+ cap->device_caps |= V4L2_CAP_FENCES;
+#endif
+ }
+ cap->capabilities |= cap->device_caps | V4L2_CAP_EXT_PIX_FORMAT;
+
/*
* Drivers MUST fill in device_caps, so check for this and
* warn if it was forgotten.
--
2.16.3
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